The TextToSpeech like in
http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/app/TextToSpeechActivity.html
works fine on th
What language are you using? If your device doesn't have the language installed, it, obviously, can't play it. If it's anything but US, try that. If so then please post your code.
I am facing the same problem with my samsung GT-S7392, here's the solution if text to speech is working on emulator but not on your phone. Just go to the settings, and set the language setting to US or UK, then run your app. It will work fine.
On my Captivate, I had to manually install (prompted by Google Navigation) the TTS data files to enable speech directions. This may have been because the rom didn't include them. I can't recall if the stock rom had the speech files or not. See this link for how to detect the presence of the right files:
http://developer.android.com/resources/articles/tts.html Basically
Intent checkIntent = new Intent();
checkIntent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA);
startActivityForResult(checkIntent, MY_DATA_CHECK_CODE);
and check the result (should be CHECK_VOICE_DATA_PASS)